Your post is misleading. The Supreme Court also has Mohammaed and Napoleon depicted alongside Moses - are they promoting France?
And true neutrality would mean that every belief system on the face of the earth should be equally recognized. That's preposterous and unworkable, and you know it.
The smattering of religious symbology the Court has allowed does nothing but further enthrone atheism as this nation's officially etablished belief system. The ACLU knows that even if you deny it. The decalogue motif at the Supreme Court building is like parsley on the corner of a dinner plate--for decoration only.
The meal is atheism and atheism alone.